modified: ext/cuda/remapping_distributed.jl

	modified:   src/Remapping/distributed_remapping.jl

Author: akshaysridhar

ext/cuda/remapping_distributed.jl

@@ -4,7 +4,8 @@ import CUDA
 using CUDA: @cuda
 import ClimaCore.Remapping: _set_interpolated_values_device!
 
-# Bilinear in [0,1]²: (1-s)(1-t)*c11 + s*(1-t)*c21 + (1-s)*t*c12 + s*t*c22
+# Bilinear in (s,t) ∈ [0,1]² (local to 2-point cell; reference element is [-1,1]²):
+# (1-s)(1-t)*c11 + s*(1-t)*c21 + (1-s)*t*c12 + s*t*c22
 @inline _bilinear(c11, c21, c22, c12, s, t) =
     (1 - s) * (1 - t) * c11 + s * (1 - t) * c21 + (1 - s) * t * c12 + s * t * c22
 

src/Remapping/distributed_remapping.jl

@@ -594,7 +594,8 @@ function _set_interpolated_values!(remapper::Remapper, fields)
     end
 end
 
-# Bilinear in [0,1]²: (1-s)(1-t)*c11 + s*(1-t)*c21 + (1-s)*t*c12 + s*t*c22
+# Bilinear in (s,t) ∈ [0,1]² (local to 2-point cell; reference element is [-1,1]²):
+# (1-s)(1-t)*c11 + s*(1-t)*c21 + (1-s)*t*c12 + s*t*c22
 @inline _bilinear(c11, c21, c22, c12, s, t) =
     (1 - s) * (1 - t) * c11 + s * (1 - t) * c21 + (1 - s) * t * c12 + s * t * c22